Basic Knowledge of Ammonia Synthesis – One Question per Day 14
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True or False Questions: 1. When the pressure in vessels and pressure pipelines exceeds 10.0 MPa, the only gasket that can be used for the sealing surface is the octagonal gasket. ( ) 2. At the coupling part of the transmission equipment, spring washers should be used on the bolt surfaces to eliminate the forces generated by vibrations. （ ） 3. The main dynamic seal for centrifugal pumps is the packing seal. ( ) 4. What is commonly referred to as direct current is a constant current. ( ) 5. In practical applications, the maximum value of alternating current is commonly used to indicate its magnitude. （ ） 1、（×）。 Correct answer: When the pressure in vessels and pressure pipelines exceeds 10.0 MPa, the gaskets used for sealing surfaces include octagonal gaskets, lens gaskets, oval gaskets, and tooth-shaped gaskets. 2、(√) 3、(×). Correct answer: The main dynamic seals for centrifugal pumps are packing seals and mechanical seals. 4. (√) 5. (×). Correct answer: In practical applications, the effective value of alternating current is commonly used to measure its magnitude.
Reply to 1# Yan Qiusheng: 1. Wrong, 2. Right, 3. Wrong, 4. Right, 5. Wrong
1. When the pressure in vessels and pressure pipelines exceeds 10.0 MPa, the only gasket that can be used for the sealing surface is the octagonal gasket. (Incorrect) 2. At the coupling section of drive equipment, spring washers should be placed on the bolt surfaces to eliminate forces caused by vibrations. (Correct) 3. The main dynamic seal for centrifugal pumps is the packing seal. (Incorrect) 4. Direct current, as commonly referred to, means a constant current. (Yes) 5. In practical applications, the maximum value of alternating current is commonly used to measure its magnitude. (Mistake)
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1. Wrong 2. Right 3. Wrong 4. Right 5. Wrong